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"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.WebSocket = void 0;
const transport_1 = require("../transport");
const debug_1 = require("debug");
const debug = (0, debug_1.default)("engine:ws");
class WebSocket extends transport_1.Transport {
/**
* WebSocket transport
*
* @param req
* @api public
*/
constructor(req) {
super(req);
this.writable = false;
this.perMessageDeflate = null;
}
/**
* Transport name
*
* @api public
*/
get name() {
return "websocket";
}
/**
* Advertise upgrade support.
*
* @api public
*/
get handlesUpgrades() {
return true;
}
/**
* Advertise framing support.
*
* @api public
*/
get supportsFraming() {
return true;
}
/**
* Writes a packet payload.
*
* @param {Array} packets
* @api private
*/
send(packets) {
this.writable = false;
for (let i = 0; i < packets.length; i++) {
const packet = packets[i];
const isLast = i + 1 === packets.length;
const send = (data) => {
const isBinary = typeof data !== "string";
const compress = this.perMessageDeflate &&
Buffer.byteLength(data) > this.perMessageDeflate.threshold;
debug('writing "%s"', data);
this.socket.send(data, isBinary, compress);
if (isLast) {
this.writable = true;
this.emit("drain");
}
};
if (packet.options && typeof packet.options.wsPreEncoded === "string") {
send(packet.options.wsPreEncoded);
}
else {
this.parser.encodePacket(packet, this.supportsBinary, send);
}
}
}
/**
* Closes the transport.
*
* @api private
*/
doClose(fn) {
debug("closing");
fn && fn();
// call fn first since socket.end() immediately emits a "close" event
this.socket.end();
}
}
exports.WebSocket = WebSocket;
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